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Conduction is heat transfer that occurs when molecules in a material are heated and the heat is passed from molecule to molecule through the material.

Although boiler water level is maintained with a feedwater pressure gauge, the boiler water level must still be routinely checked by a boiler operator.

A check valve allows water to flow in one direction only.

Conduction is heat transfer that occurs when molecules in a material are heated and the heat is passed from molecule to molecule through the material.

The two classifications of air conditioners are package air conditioners and split-system air conditioners.

In an air atomizing burner, steam and fuel are discharged to the burner for combustion after the flames reach the end of the combustion chamber.

In an air atomizing burner, steam and fuel are discharged to the burner for combustion after the flames reach the end of the combustion chamber.

A hot water heating system operates at ___.

In addition to safety valves, four other types of valves are sometimes used on boilers to prevent overpressure.

Heating units are designed to minimize heat loss from a building space.